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#ifndef Py_PYMACRO_H
#define Py_PYMACRO_H
#define Py_MIN(x, y) (((x) > (y)) ? (y) : (x))
#define Py_MAX(x, y) (((x) > (y)) ? (x) : (y))
/* Argument must be a char or an int in [-128, 127] or [0, 255]. */
#define Py_CHARMASK(c) ((unsigned char)((c) & 0xff))
/* Assert a build-time dependency, as an expression.
Your compile will fail if the condition isn't true, or can't be evaluated
by the compiler. This can be used in an expression: its value is 0.
Example:
#define foo_to_char(foo) \
((char *)(foo) \
+ Py_BUILD_ASSERT_EXPR(offsetof(struct foo, string) == 0))
Written by Rusty Russell, public domain, http://ccodearchive.net/ */
#define Py_BUILD_ASSERT_EXPR(cond) \
(sizeof(char [1 - 2*!(cond)]) - 1)
/* Get the number of elements in a visible array
This does not work on pointers, or arrays declared as [], or function
parameters. With correct compiler support, such usage will cause a build
error (see Py_BUILD_ASSERT_EXPR).
Written by Rusty Russell, public domain, http://ccodearchive.net/
Requires at GCC 3.1+ */
#if (defined(__GNUC__) && !defined(__STRICT_ANSI__) && \
(((__GNUC__ == 3) && (__GNU_MINOR__ >= 1)) || (__GNUC__ >= 4)))
/* Two gcc extensions.
&a[0] degrades to a pointer: a different type from an array */
#define Py_ARRAY_LENGTH(array) \
(sizeof(array) / sizeof((array)[0]) \
+ Py_BUILD_ASSERT_EXPR(!__builtin_types_compatible_p(typeof(array), \
typeof(&(array)[0]))))
#else
#define Py_ARRAY_LENGTH(array) \
(sizeof(array) / sizeof((array)[0]))
#endif
/* Define macros for inline documentation. */
#define PyDoc_VAR(name) static char name[]
#define PyDoc_STRVAR(name,str) PyDoc_VAR(name) = PyDoc_STR(str)
#ifdef WITH_DOC_STRINGS
#define PyDoc_STR(str) str
#else
#define PyDoc_STR(str) ""
#endif
/* Below "a" is a power of 2. */
/* Round down size "n" to be a multiple of "a". */
#define _Py_SIZE_ROUND_DOWN(n, a) ((size_t)(n) & ~(size_t)((a) - 1))
/* Round up size "n" to be a multiple of "a". */
#define _Py_SIZE_ROUND_UP(n, a) (((size_t)(n) + \
(size_t)((a) - 1)) & ~(size_t)((a) - 1))
/* Round pointer "p" down to the closest "a"-aligned address <= "p". */
#define _Py_ALIGN_DOWN(p, a) ((void *)((Py_uintptr_t)(p) & ~(Py_uintptr_t)((a) - 1)))
/* Round pointer "p" up to the closest "a"-aligned address >= "p". */
#define _Py_ALIGN_UP(p, a) ((void *)(((Py_uintptr_t)(p) + \
(Py_uintptr_t)((a) - 1)) & ~(Py_uintptr_t)((a) - 1)))
/* Check if pointer "p" is aligned to "a"-bytes boundary. */
#define _Py_IS_ALIGNED(p, a) (!((Py_uintptr_t)(p) & (Py_uintptr_t)((a) - 1)))
#endif /* Py_PYMACRO_H */